Insertible tooth for metal saws.



No. 846,196. PATENTED MAR. 5, 1907.

S. FREAS.

INSERTIBLB TOOTH POR METAL SAWS. APPLIGATION FILED sEPT.21.19o6.

iinirnn srAfrns Parar owl- 8c SONS, INCORPORATED, OF PHILADELPHIA,-

PORATION OF PENNSYLVANIA.

PENNSYLVANIA, A COR- BNSERTIBLE TOOTH FR METAL SAW S.

no. 846,196. specification of Letters Patent. Patented March 5, 1907..'

- Application filed September 2I.19O61. Serial No. 335.614.

To 1f/ wlw/711, it 11mg/ concern: l

Be it known that I, SAMUEL Franzis, a citizen of the United States residing at Trenton, New Jersey, have invented certain Improvements'in lnsertible Teeth for Metal Saws, of which thefollowing is a specification.

The object of my invention is to provide means for readily Vand securely fastening insertible saw-teeth in saw-blades.

My .invention is particularly adapted to circular saws for sawing metal.

Referring to the accompanying drawing, Figure l is a side view of sufficient of a circular saw to illustrate my invention. Fig. 2 is a sectional view on the line 2 -2, Fig. 3. Fig. 3 is an edge vie Fig. 4; is a sectional view on the line l Ll, Fig. 2, and Figs. 5 and 6 are views showing the parts detached.

A is the blade or body of a circular saw, .having recesses c, shaped as shown.

B is the sa tooth, and D is the wedge, which is mounted in the recess a back of the shank of the tooth. The point b of the tooth can be of any shape Adesired without departing' from my invention. The shank b of the tooth in the present instance lhas a V-shaped ton ue b2 extending the length of the shank at the front edge, which meshes with a V-sha ed roove a in the wall of the recess al. he back edge of the shank b of the tooth is beveled to fit the groove d in the front edge of the wedge D. The rear edge d of' the wedge is also grooved to receive the beveled edge c2 of the wall ofthe recess a.

A screw E, having a perforated head e, is screwed into an o ening in the body or blade A of the saw, the head resting under the sawtooth, as shown in Fi 2. By turning the scrlfw E the tooth can ghe adjusted longitudif na v.

tapered, being narrower at the pe-` riphery of the blade than at the base of the recess, and the wedge is of a greater width at the base than at the outer edge, so that the wedge is forced outward to fasten the tooth to the blade. In order to force the wedge outward, I mount an adjusting-screw F in a lon 'tudinal screw-threaded opening in the we ge, as shown in Fig. 2, the inner end ofV the screw resting on an abutment als, forming part of the base of the recess a..

On turning the screw F in one direction the wedge will be forced toward the periphery of The opening back of the tooth for the wedge is the blade and will securely fasten the tooth to the blade. By turning the screw in the opposite direction it will be backed off of its i seat, and then by ta ping the wedge it will be l forced inward, and t e tooth will be released. I preferably make the shank of the tooth l slightly tapered, it being' wider at the base l than at the throat, so that .there is no tend- 'l ency for the tooth to draw out by the action l of the saw as it cuts into the metal. Any l pull onthe tooth will causethe wedge to l more firmly grip the tooth. g vBy my improvement the teeth of the saw l can be mounted very close together, which will` prevent the jarring of the mechanism of the saw. The teeth can be readily inserted or removed or adjusted, and when in lace they are rigidly held, so as to withstan the l strains to which they are subjected. v l While my invention is articularly adapted for use in circular saws or sawing metal, it will be understood that the invention can be l used in any type of saw for sawing any material.

I claim- 1. -The combination of the recessed body of a saw, a tooth mounted in said recess and a wedge also mounted in the recess back of the tooth, the wedge'being wider at the inner end than at the outer end, substantially as described.

2. The combination of of a saw, a tooth mounted in said recess, a

j wedge also mounted in said recess back of the tooth, said wedge being wider at the inner end than at the outer end, and an adjustingscrew passing through a threaded opening in the wedge and bearing upon the base of the recess, substantially as described.

. l3. The combination of the recessed blade of a saw,` a tooth having a point and a shank, said shank being wider at the base than at the throat, a wedge in the'recess back of the tooth, said wedge being wider at the inner end thgan at the outer end, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL FREAS.

Witnesses:

E. B. ROBERTS, W. C. BURKHOLDER.

the recessed body slightly tapered," being y ICO 

